Stereoscopic image showing a side view of a French Breguet-Michelin 'Breguet 4' biplane bomber aircraft, the pilot in the cockpit, with several soldiers pushing the lower wing, as the plane prepares to take flight during World War One, at an unspecified airfield, location unspecified, France, circa 1916. (Photo by Keystone View Company/Graphic House/Archive Photos/Getty Images)
